MAMMOTH 54" Steel Frame In-Ground Basketball System

MAMMOTH 54" Steel Frame In-Ground Basketball System -
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Item # 12959314


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Product Details

The Lifetime® Mammoth 54" in-ground basketball system features a powder-coated steel frame and a tempered glass backboard with fade-resistant graphics, giving you the performance and look of a pro-style game. The Mammoth Pump™ height-adjustment mechanism easily adjusts from 7.5' to 10' in infinite height increments. The system also features a heavy-duty Spring-Flex™ rim with a wrap-around steel brace and a heavy-duty nylon net.

Key Specs:

  • Model Number: 90179
  • Backboard Shape: Rectangular / Square
  • Backboard Height: 36 inches
  • Backboard Size: 54 inches
  • Backboard Width: 54 inches
  • Thickness of Backboard : 2 inches
  • Basketball Backboard Material: Clear Tempered Glass
  • Rim Size: 5/8 Inch
  • All Weather Basketball Net: Yes
  • Pole Pieces : 1 Poles
  • Pole Size Square: 5 inches
  • Overhang from Pole: 35" Overhang
  • Adjustable Height Minimum: 7.5 ft
  • Adjustable Height Maximum: 10 ft
  • Mounting System: Anchor Bolt Mounting System
  • Backboard Warranty: Lifetime Limited




  • Rim: Spring Flex
  • Pole Shape: Square
  • Provides added strength
  • Powder Coat Finish: Yes
  • Protects against fading and weather.
  • Height Adjustment System: Mammoth Pump™
  • Triggerless height adjustment is easy for anyone to use.

Additional Info

  • Steel extension arms provide superior backboard support and plenty of room under the basket
  • 18" Spring-Flex™ rim made of 5/8" solid steel with wrap-around steel brace and 160g all-weather nylon net
  • One-piece 5" square pole located in the front of the anchor-plate to minimize wobble and pole vibration
  • Pole-anchoring system with a unique bolt-down design for precision leveling

Product Reviews


by PowerReviews
MAMMOTH 54" Steel Frame In-Ground Basketball System

(based on 2 reviews)

Ratings Distribution

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  • 1 Stars



Reviewed by 2 customers

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(2 of 2 customers found this review helpful)


Solid hoop that should last years. The Mammoth 54" thumbs up

By Tobias Funke

from Back East

Verified Reviewer

Comments about MAMMOTH 54" Steel Frame In-Ground Basketball System:

To highlight some comments made, this is a very nice basketball hoop. We went with the 54" since it was similar in size as to the previous hoop we had. We bought ours as well from Sports Authority (SA) since there was a good deal and you get a significant return using their rewards program. We also used the installers through SA which was Urban Express- Assembly (more on them later) at a cost of $350.

Urban Express- Assembly was OK. The process is slow. It took from first contact to completion over 3 weeks. It would have taken longer but we had our Dig Safe work recently completed for the drive-way so this shortened the time. You must be proactive and call them. They will not contact you although you are told that they will.

The install is labor intensive and I was just not up for the challenge of 13 bags of concrete to be mixed and digging a hole 4' deep and 2' wide plus adding in rebar and such. After we had our date fixed, the process takes two visits. One for the hole and concrete and one for the install of the hoop. The installer in our area covers probably an area of 150 miles easy. He was driving all over the place. Nice guy and very professional. The communication could have been better (afternoon does not mean 8PM at night........).

The basket is far more sturdy than the previous one we had with a small 4" pole. This is a solid piece of steel. The basket is easily moved up and down with the shock system. It has a good look and my son is happy so that is really all that matters. That said, I am happy as well.

Basketball Backboard: The Mammoth's 54" steel backboard and tempered glass surface gives this system the professional look and provides the ultimate in rebounding performance.
Basketball Extension Arms: Colossal steel extension arms provide superior backboard support and a generous 35" span from the front of the pole to the backboard to create plenty of playing room beneath the basket.
Basketball Rim: The high-performance Spring-Flex™ rim features a continuous net hook wire, securing the heavy-duty all-weather nylon net to the rim with minimal intrusion. Double-compression springs allow the rim to spring back from a slam dunk.
Basketball Adjustment Mechanism: The Mammoth Pump™ features a revolutionary pneumatic height adjustment mechanism which allows for effortless one-hand adjustment of the backboard from 7.5 to 10 ft simply by pulling a handle.
Basketball Anchor Plate: The unique bolt-down design of our Mammoth systems uses an anchor plate and 4 J-hooks that are cemented down in the ground. The bottom of the basketball pole is then bolted down on top of the J-hooks. The bolts are inserted into slots, rather than holes, to allow for precision adjustments in straightening the pole. This bolt-down design allows for excellent rigidity and precision leveling, as well as later removal of the system if necessary.

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(22 of 22 customers found this review helpful)


Good compromise between quality & price

By Coach

from Fremont, CA

About Me Beginner


  • Durable
  • Easy To Use
  • Good Design
  • Quality Materials


    Best Uses

      Comments about MAMMOTH 54" Steel Frame In-Ground Basketball System:

      We were looking for a basketball system for our driveway and wanted something sturdy that wouldn't rattle or make a lot of noise when it hit the backboard. Unlike some of the other systems on display, the height adjustment is very smooth and easy to operate. I have had no problems with the height moving on its own.

      We were not planning on moving the system around so an in-ground system made sense. Since it was going to be on the side of the driveway, we also avoided the big base which allowed us to install it closer to the side, allowing more room (about 3 feet) for playing.

      There are many portable systems that cost a lot less. Like anything else, you will get what you pay for. The build of this system is very solid and we expect to get a lot more use out of this system over a portable one.

      This in-ground system is very sturdy since it is bolted to a 3 foot deep concrete footing. The tempered glass backboard does not shake (or make a lot of noise) when the ball hits it. Also, the height adjustment is extremely easy to operate.

      We had it installed by Sports Authority and they took care of pouring the concrete and installing everything. This adds to the cost of the system. If you are comfortable digging a hole and pouring a footing and placing rebars, you could save money by doing it yourself.

      The only downside to this product is that it costs more than portable systems so you need to decide if cost or function is more important.

      I'm pretty picky when it comes to sports equipment. Understanding that there are better systems out there that also cost more, we are very happy with the system because it is sturdy, quiet and durable at a cost slightly above a really good portable system.

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